Water Rocket Forum

Welcome to the Water Rocket Forum, sponsored by The Water Rocket Achievement World Record Association.

The largest, most sophisticated and ground breaking group supporting you, the serious water rocket flyer! Whether you are a beginner or an expert, the WRA2 has something for everyone.

A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

Is there a list of acceptable altimeters that are allowed in the competitions?

Hi rozermac,

Since we are a worldwide organization, it would be difficult to maintain a current list of the available altimeters and keeping the list up to date when the manufacturers release new models and discontinue old ones or new companies come online. We provide a generic specification in the competition rules for the type of altimeter required. What you can do if in doubt is to find a locally available altimeter and then come back here and post a link to the site selling it and ask if this altimeter will work for whichever competition you were planning on participating in. If in doubt, ask before you buy or build.

Lisa Walker,Forum Administrator. The Water Rocket Achievement World Record Association